035-17311-000 REV A (1200))
Unitary Products Group
25
AIR BALANCE
Start the supply air blower motor. Adjust the resistances in
both the supply and the return air duct systems to balance
the air distribution throughout the conditioned space. The job
specifications may require that this balancing be done by
someone other than the equipment installer.
CHECKING AIR QUANTITY
TABLE 24: 10 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
1
2
ESP
3
TURNS OPEN
4
0
1
2
3
4
5
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
0.2
-
-
-
-
-
-
-
-
-
4368
1843
1.98
4132
1624
1.74
3870
1423
1.53
0.4
-
-
-
4515
2192
2.35
4213
1885
2.02
4020
1692
1.81
3791
1491
1.60
3499
1283
1.38
0.6
-
-
-
4192
2027
2.17
3905
1741
1.87
3657
1537
1.65
3383
1345
1.44
3062
1149
1.23
0.8
-
-
-
3838
1858
1.99
3534
1591
1.71
3236
1386
1.49
2934
1202
1.29
-
-
-
1.0
3755
1942
2.08
3489
1695
1.82
3081
1425
1.53
-
-
-
-
-
-
-
-
-
1.2
3337
1757
1.88
2918
1475
1.58
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance is for gas heat and includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
TABLE 25: 10 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
1
2
ESP
3
TURNS OPEN
4
0
1
2
3
4
5
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
CFM
W
5
BHP
0.2
-
-
-
-
-
-
-
-
-
-
-
-
5067
2614
2.80
4809
2290
2.46
0.4
-
-
-
-
-
-
5179
3112
3.34
4884
2703
2.90
4729
2401
2.57
4459
2113
2.27
0.6
-
-
-
-
-
-
4925
2943
3.16
4585
2521
2.70
4429
2244
2.41
4137
1964
2.11
0.8
-
-
-
4974
3220
3.45
4607
2727
2.92
4267
2342
2.51
4099
2080
2.23
3783
1809
1.94
1.0
4975
3453
3.70
4657
2995
3.21
4305
2550
2.73
3941
2171
2.33
3751
1919
2.06
3371
1630
1.75
1.2
4679
3423
3.67
4366
2808
3.01
4022
2373
2.54
3545
1978
2.12
3305
1741
1.87
-
-
-
1.4
4429
3065
3.29
4040
2607
2.80
3669
2673
2.87
2918
1700
1.82
-
-
-
-
-
-
1.6
4107
2845
3.05
3620
2357
2.53
2931
1830
1.96
-
-
-
-
-
-
-
-
-
1.8
3553
2500
2.68
2756
1899
2.04
-
-
-
-
-
-
-
-
-
-
-
-
2.0
2439
1939
2.08
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance is for gas heat and includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts